Abstract

The complete mitogenome of the estuarine ribbon worm Yininemertes pratensis (Sun and Lu 1998) (Nemertea: Lineidae) was sequenced for the first time in the present study. The total length of the newly sequenced mitogenome is 15,616 bp, and it includes 13 protein-coding, 2 rRNA, and 24 tRNA genes, in addition to a noncoding region of 571 bp. The phylogenetic position of Y. pratensis was examined through maximum-likelihood analysis using a concatenated dataset of 13 protein-coding genes from seven selected nemertean species. Yininemertes pratensis is placed within the pilidiophoran group and is closely related to Lineus alborostratus among the selected nemerteans. The newly determined mitogenome sequence will further our knowledge for future phylogenetic and ecological studies of this species.

摘要

本研究首次对河口带虫Yiinemertes pratensis (Sun and Lu 1998 ) (Nemertea: Lineidae)的完整有丝分裂基因组进行了测序。新测序的有丝分裂基因组的总长度为 15,616 bp，它包括 13 个蛋白质编码基因、2 个 rRNA 和 24 个 tRNA 基因，此外还有一个 571 bp 的非编码区。使用来自七个选定纽虫物种的 13 个蛋白质编码基因的串联数据集，通过最大似然分析检查了Y. pratensis的系统发育位置。Yininemertes禾放在pilidiophoran组内，并有密切的关系Lineus alborostratus在选定的纽虫中。新确定的有丝分裂基因组序列将进一步加深我们对该物种未来系统发育和生态研究的认识。